On 2 August 1939 HMS Oberon was recommissioned after she had been in reserve from 1937. She was mainly used for training. Decommissioned at Blyth on 5 July 1944. Sold to be broken up for scrap on 24 August 1945. Scrapped at Dunston.

During the night of 9/10 September 1939 HMS Oberon was in company with HMS Bittern (Cdr. G.F. Stevens-Guille, OBE, RN) and HMS Enchantress (Cdr. A.K. Scott-Moncrieff, RN).

Around 0930/10, HMS Oberon, took station astern of a convoy until 1600 hours when she joined HMS Matabele (Cdr. G.K. Whitmy-Smith, RN) which remained with Oberon until she was off Dundee on the 13th. (1)

12 Oct 1939HMS Oberon (Lt.Cdr. H.C. Cumberbatch, RN) departed Dundee for Portland. She made part of the passage in convoy FS 20. During passage through the Channel she was escorted by HMS Boadicea (Lt.Cdr. G.B. Kingdon, RN) and later by HMS Saladin (Lt.Cdr. L.J. Dover, RN). (3)

22 Mar 1941HMS Oberon (Lt.Cdr. E.F. Pizey, DSC, RN) departed Rothesay for her 4th war patrol. She was ordered to patrol in the Bay of Biscay as it is feared the German battlecruisers Scharnhorst and Gneisenau might break out from Brest.

Passage through the Irish Sea was made together with the Dutch submarine HrMs O 24 (Lt.Cdr. O. de Booy, RNN). They were escorted by the British armed yacht HMS Shemara (Cdr.(Retd.) H. Buckle, RN). (2)

22 Mar 1941

For the daily positions of HMS Oberon during her 4th war patrol see the map below.

16 Dec 1941HMS Oberon (Lt.Cdr. P.J.H. Bartlett, RN) departed Rothesay for her 5th war patrol. She was ordered to patrol in the Bay of Biscay as it is feared the German battlecruisers Scharnhorst and Gneisenau and heavy cruiser Prinz Eugen might breack out from Brest.

For the daily positions of HMS Oberon during this patrol see the map below.

(2)

18 Dec 1941HMS Oberon (Lt.Cdr. P.J.H. Bartlett, RN) is forced to abandon her war patrol due to a serious leak aft and several other defects. Course is set to return to Rothesay escorted by HMS Cutty Sark (Cdr.(Retd.) R.H. Mack, RN). (2)

2 Feb 1942HMS Oberon (Lt.Cdr. P.J.H. Bartlett, RN) conducted exercises in the Clyde area for the C.O.Q.C. (Commanding Officers Qualifying Course) with HMS Carina (Lt. R.A.H. Lord, RNR). The exercises had to be abandoned due to the poor visibility. (34)

15 Mar 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) served as target in the Clyde area for members of the C.O.Q.C. (Commanding Officers Qualifying Course) with were embarked in HMS Sealion (Lt. D.S.M. Verschoyle-Campbell, DSC, RN). (38)

16 Mar 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) served as target in the Clyde area for members of the C.O.Q.C. (Commanding Officers Qualifying Course) with were embarked in HMS Sealion (Lt. D.S.M. Verschoyle-Campbell, DSC, RN). (38)

30 Mar 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) served as target in the Clyde area for members of the C.O.Q.C. (Commanding Officers Qualifying Course) with were embarked in HMS Sealion (Lt. D.S.M. Verschoyle-Campbell, DSC, RN).

20 Apr 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) served as target in the Clyde area for members of the C.O.Q.C. (Commanding Officers Qualifying Course) with were embarked in HMS Sealion (Lt. D.S.M. Verschoyle-Campbell, DSC, RN).

Upon completion of these exercises HMS Oberon served as target for HMS Ultimatum (Lt. W.H. Kett, RNR). (39)

21 Apr 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) served as target in the Clyde area for members of the C.O.Q.C. (Commanding Officers Qualifying Course) with were embarked in HMS Sealion (Lt. D.S.M. Verschoyle-Campbell, DSC, RN).

Upon completion of these exercises HMS Oberon served as target for HMS Unsparing (Lt. A.D. Piper, DSC and 2 bars, RD, RNR). (39)

2 Jul 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) conducted exercises in the Clyde area with a training class of new submariners. Upon completion of these exercises HMS Oberon was docked at Rothesay. (43)

7 Jul 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) was undocked. (43)

7 Jul 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) is undocked. (43)

8 Jul 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) conducted exercises in the Clyde area with a training class of new submariners. (43)

9 Jul 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) conducted exercises in the Clyde area with a training class of new submariners. (43)

10 Jul 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) conducted exercises in the Clyde area with a training class of new submariners. (43)

11 Jul 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) conducted exercises in the Clyde area with a training class of new submariners. (43)

12 Jul 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) conducted exercises in the Clyde area with a training class of new submariners. (43)

13 Jul 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) conducted exercises in the Clyde area with a training class of new submariners. (43)

14 Jul 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) conducted exercises in the Clyde area with a training class of new submariners. (43)

15 Jul 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) conducted exercises in the Clyde area with a training class of new submariners. (43)

16 Jul 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) conducted exercises in the Clyde area with a training class of new submariners. (43)

19 Jul 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) conducted exercises in the Clyde area with a training class of new submariners. (43)

20 Jul 1943HMS Oberon (Lt.Cdr. J.W. McCoy, DSC, RN) conducted exercises in the Clyde area with a training class of new submariners. Upon completion of these exercises Lt.Cdr. Kershaw took over command from Lt.Cdr. McCoy. (43)

6 Aug 1943HMS Oberon (Lt.Cdr. J.B.de B. Kershaw, DSO, RN) conducted exercises in the Clyde area with a training class of new submariners. Upon completion of these exercises HMS Oberon proceeded to Glasgow. (44)

26 Oct 1943HMS Oberon (Lt. M.L.C. Crawford, DSC, RN) served as target in the Clyde area for members of the C.O.Q.C. (Commanding Officers Qualifying Course) with were embarked in HMS Sirdar (Lt. J.A. Spender, RN). (46)